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HAT-P-4b

Discovered by: Kovács et al. 2007
The Star
Simbad
GAIA
2MASS
BD+36 2593
DR2 1291120362349158016
J15195792+3613467
RA 15:19:57.9205 DEC +36:13:46.737
Parallax
3.092 mas
P.M. RA
-21.661 mas/y
P.M. DEC
-24.25 mas/y
MagV
11.12
MagR*
10.848
MagI*
10.443
MagJ
10.1
MagH
9.837
MagK
9.77
MagG
11.063
MagGBP
11.39
MagGRP
10.605
* calculated from GAIA magnitudes

Ephemeris - Not verified False
Sada et al. 2012
Mid-time
2454245.8152 ± 0.0002 BJDTDB
Period
3.0565254 ± 1.2e-06 days

Transit Parameters
Christiansen et al. 2011
Rp/Rs
0.086 ± 0.008
a/Rs
6.0 +0.3 -0.3
i
89.7 +0.3 -0.3 deg
e
-
ω
- deg
DepthR*
9.84 mmag
Duration*
4.25 hours
* calculated from the other parameters, using PyLightcurve

Limb Darkening Parameters
Torres et al. 2008
Teff
5860.0 +80.0 -80.0 K
Log(g)
4.36 +0.11 -0.11 cm/s2
Fe/H
0.24 +0.08 -0.08 dex
ExoClock Status
Observing Priority
Total Observations (Recent)
O-C minutes
Total Literature Mid-times
MEDIUM
7 (1)
-2.2±0.7
0
HAT-P-4b


ExoClock Observations
Obs. Date O-C (min) Observer
Observatory
Telescope
Camera / Filter / Exp [s]
2020-07-08 2.4 ± 2.2 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / Clear / 120.0
2020-03-25 -3.5 ± 1.9 Manfred Raetz
privat observatory Herges-Hallenberg
SCT 280 /1790 (Celestron C11 with reducer)
Moravian Instruments G2-1600 / Clear / 120.0
2020-03-25 -7.6 ± 3.0 John Savage
Z42 Rushay Farm Observatory
Celeston 14Edge with focal reducer
ATIK One 9.0 / R / 90.0
2019-03-15 -0.8 ± 3.2 Anaël Wünsche
Observatoire des Baronnies Provençales
CDK Planewave
SBIG STL11K / V / 120.0
2018-04-19 -3.3 ± 1.3 Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0
2015-06-27 -1.2 ± 1.3 Anaël Wünsche
Observatoire des Baronnies Provençales
Astelco
FLIPL230 / V / 120.0
2014-04-16 -8.8 ± 8.6 Claudio Lopresti
Claudio Lopresti
Mak-Newton
CCD Sbig ST10xme / R / 240.0
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